Hello,
I encounter the same problem while running a WP 4.9.7 with Event maker 1.6.14.
What is very strange, is that even in admin event panel, when sorting events list on start date, the event still appear in creation order (or in post-id order).
I read now that my version of Event Maker is compatible ut to WP 4.7.11, so that this problem may be linked to changes in date gestion in recent WP ?
I saw that the latest EM version enabled dates format choice and I tried to encode the same date format in the WP settings and this does not change anything.
I also tried to set the default sort order ont start_date ine the EM general settings, but this also does not change anything.
Thanks in advance for suggestions …
Zabelle